2012
DOI: 10.1016/j.compfluid.2012.01.005
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A contribution to the understanding of cavitation effects in Diesel injector nozzles through a combined experimental and computational investigation

Abstract: ElsevierPayri González, F.; Payri, R.; Salvador Rubio, FJ.; Martínez López, J. (2012). A contribution to the understanding of cavitation effects in Diesel injector nozzles through a combined experimental and computational investigation. Computers and Fluids. 58:88-101. doi:10.1016/j.compfluid.2012 ABSTRACTIn this paper a combined experimental and computational study was carried out in order to assess the ability of a Homogeneous Equilibrium Model in predicting the experimental behaviour observed from the hy… Show more

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Cited by 93 publications
(79 citation statements)
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“…The effect of increased injection pressure, which increased spray velocity/momentum [21], is more noticeable in the transient part of the liquid spray penetration than the quasi steady stage. The slight positive slope observed at the steady period in some of the liquid penetration curves in Figures 4 and 5 can be attributed to two factors [8,17]. Firstly, the temperature of the fuel at the beginning of the injection is higher because the injector sac is always in direct contact with the high temperature gas of the combustion chamber; during the injection, the fuel flowing from upstream of the sac cools down the injector tip.…”
Section: Resultsmentioning
confidence: 99%
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“…The effect of increased injection pressure, which increased spray velocity/momentum [21], is more noticeable in the transient part of the liquid spray penetration than the quasi steady stage. The slight positive slope observed at the steady period in some of the liquid penetration curves in Figures 4 and 5 can be attributed to two factors [8,17]. Firstly, the temperature of the fuel at the beginning of the injection is higher because the injector sac is always in direct contact with the high temperature gas of the combustion chamber; during the injection, the fuel flowing from upstream of the sac cools down the injector tip.…”
Section: Resultsmentioning
confidence: 99%
“…The analyses of injection system development have been presented from several viewpoints. Nozzle geometry has been studied for the influence on the internal flow and spray characteristics with respect to: atomization [4,5], mixing processes [6,7], emission [9,10] and cavitation [8,13]. Different injection strategies have been investigated to show the effect on pollutant emissions [2,3].…”
Section: Introductionmentioning
confidence: 99%
“…The mass flow rate under choking conditions is controlled by the pressure drop between the upstream reservoir (p 1 ) and the section in which cavitation appears (p v ), while it is not correlated well with the pressure drop (p 1 − p 2 ) over the nozzle [39].…”
Section: Physics Of Cavitation and Comparison With Supersonic Flowsmentioning
confidence: 99%
“…The characterization provided for the choked flow, due to cavitation, theoretically makes this kind of regime clearly distinct from cavitation inception and supercavitation, even though the hydraulic criteria used to detect cavitation inception are often based on the detection of mass flow choking [39], or are empirically expressed in terms of a certain percentage reduction in the flow rate compared with the choking conditions [121,122]. On the other hand, the instability that occurs in transitional cavitation, within the L cav /L ≈ 0.25-0.35 range (see §3), makes it practically difficult to distinguish between the condition at which cavitation spreads over a critical section (choking) and the condition at which cavitation reaches the nozzle exit (supercavitation).…”
Section: Physics Of Cavitation and Comparison With Supersonic Flowsmentioning
confidence: 99%
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